Upgraded a Sencha Architect app from 3.04 to 3.10. Now I'm getting this error when building:

Exception in thread "Thread-22" com.sencha.exceptions.BasicException: The following error occurred while executing this line:

/Users/mattkim/Dropbox/work/bridgetax/qi/.sencha/app/build-impl.xml:378: The following error occurred while executing this line:
/Users/mattkim/Dropbox/work/bridgetax/qi/.sencha/app/init-impl.xml:303: com.sencha.exceptions.ExBuild: Mixed-Mode x-compile and microload markup is currently unsupported
at com.sencha.exceptions.BasicException.wrap(BasicException.java:54)
at com.sencha.ant.AntScript.execute(AntScript.java:121)
at com.sencha.command.plugin.PluginManager.execute(PluginManager.java:93)
at com.sencha.command.plugin.PluginManager.executeReverseFirst(PluginManager.java:134)
at com.sencha.command.environment.BuildEnvironment.execute(BuildEnvironment.java:252)
at com.sencha.command.environment.AppOrPackageEnvironment.execute(AppOrPackageEnvironment.java:593)
at com.sencha.command.BasePluginCommands$BasePluginCommand.doExecute(BasePluginCommands.java:92)
at com.sencha.command.app.AppCommands$BuildCommand.execute(AppCommands.java:329)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sencha.util.MethodInvoker$Arguments.invoke(MethodInvoker.java:175)
at com.sencha.cli.Command.dispatch(Command.java:43)
at com.sencha.command.BasePluginCommands$BasePluginCommand.dispatch(BasePluginCommands.java:148)
at com.sencha.cli.Commands.dispatch(Commands.java:64)
at com.sencha.cli.Commands.dispatch(Commands.java:64)
at com.sencha.command.Sencha.dispatch(Sencha.java:73)
at com.sencha.cli.AbstractCommand.dispatch(AbstractCommand.java:124)
at com.sencha.tools.server.service.tasks.DispatchTask.execute(DispatchTask.java:48)
at com.sencha.tools.server.service.tasks.BaseServiceTask$1.run(BaseServiceTask.java:38)
at com.sencha.util.ThreadUtil$1.run(ThreadUtil.java:143)
at java.lang.Thread.run(Thread.java:745)


Any thoughts?